Sand delivery pipe nozzle



Nov. 7, 1.950

G. S. TURNER, JR

SAND DELIVERY PIPE NOZZLE Filed Nov. 18, 1949 pm a h Patented Nov. 7, 1950 UNITED STAT ATENT OFFICE SAND DELIVERY PIPE NOZZLE poration of Illinois Application November 18, 1949, Serial No. 128,157

1 Claim. 1

The invention relates to nozzles for discharging sand from a delivery pipe onto a railway rail.

In practice it has been found that nozzles for this purpose generally become clogged with ice or other material. One object of the invention is to provide a nozzle which minimizes clogging and which, if it becomes clogged, can be cleared by the blast of sand from the delivery pipe.

Other objects of the invention will appear from the detailed description.

The invention consists in the several novel features hereinafter set forth and more particularly defined by a claim at the conclusion hereof.

In the drawings:

Fig. l is a diagrammatic view of a locomotive wheel and a sand-delivery pipe equipped with a nozzle embodying the invention; and

Fig. 2 is a longitudinal section of the nozzle.

The invention is exemplified in a, one-piece nozzle which is formed of elastic material, such as suitable rubber, which is detachably connected to a pipe ill from a trap through which sand is delivered into pipe by air under pressure. The inlet end of the nozzle is usually connected by a hose coupling [2 to the lower end of pipe 10. The lower end of the pipe i6 is usually supported from the truck-frame and the nozzle is positioned to direct the sand between the railway rail 14 and the locomotive drive wheel 16, as well understood in th art. 7

The nozzle is formed in one piece with a tubular body iii of elastic material. The sand-delivery pipe It! extends into the inlet end of the bore 59 and the nozzle is secured on said pipe by a suitable clamp 52 which fits against an annular shoulder M on body l8. The bore l9 extends outwardly from the end of pipe ill and terminates, as at 22, at the outer end of an annular wall 23 of the body E8. The body is provided with a tubular wall 26 which forms an integral extension of elastic material and provides a discharge orifice 2'! which is spaced outwardly from the end 22 of bore !9. The annular wall 26 has a tapered inner peripheral portion 28, a tapered outer peripheral portion 29, and a straight inner peripheral portion 30 which extends around and is spaced from the wall 23 in body Hi to extend the chamber in the extension around wall 23. This extension with the internal periphery described forms an expansion chamber between the outer end 22 of bore 59 and the discharge orifice 21 of tubular wall 26 and around the outer end of the wall 23 of the body at the discharge end of bore l9.

In operation, air under pressure from the sand trap forces the sand through the bore 19 and the expansion chamber and is finally discharged at the orifice 21 at the outer end of the annular wall 26. The pressure of air in this expansion chamber exerts an outward pressur on the tapered elastic annular wall 26 and flexes the wall to aid in loosening any adhering material. The tapered outer periphery of wall 26 tends to defiect the water away from the outer end of the nozzle. Water which enters the lower portion of the expansion chamber through orifice 21 will be retained in the lower portion of the chamber and under the discharge end 22 of bore l9. This lessens the likelihood of obstructing the outer end of the bore. If under extreme climatic conditions, ice forms in or across the orifice 21, the next time sand and compressed air are delivered into the nozzle through bore IS the pressure will flex and expand the elastic tapered wall 26 and loosen the obstructing material so it will be discharged outwardly from the orifice 21 to clear the nozzle.

The invention is not to be understood as restricted to the details set forth since these may be modified within the scope of the appended claim without departing from the spirit and scope of the invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

A sand pipe nozzle comprising a one-piece tubular body of elastic material having a bore, the inner end of which is adapted for connection to a pipe for delivering sand under air pressure into the bore, the body having an integral inner cylindrical wall at the outer end of the bore, and an outer integral cylindrical wall radially spaced from and adjacent the outer end of the inner cylindrical wall to provide an annular channel between the inner and outer cylindrical walls, the body being provided with an outwardly tapered integral extension from the outer cylindrical wall terminating in an outlet outwardly beyond the outer end of the inner cylindrical wall, the extension forming a tapered portion which is expansible by pressure developed in the extension by fluid from the bore.

- GUILFORD S. TURNER, JR.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 367,062 Reagan July 26, 1887 431,150 Reagan July 1, 1890 2,196,977 Campbell et a1 Apr. 16, 1940 2,437,384 Gee Mar. 9, 1948 FOREIGN PATENTS Number Country Date 24,951 England Nov. 20, 1908 

